Suspension insulator



Sept. 2. 1924. H 1,506,863

' B. A. PLIMPTON susnusxon msumwon an ina! Filed ,Aug. 26, 1918 Mkf/wsses: INVEN TOR Bezzilqgziflmyzion 7' I BY Wk Patented Sept. 2, 1924.

UNITED STATES PATENT OFFICE.

BENTLEY A. PLIMPTON, OF VICTOR, NEW YORK.

SUSPENSION INSULATOB.

Application filed August 26, 1918, Serial No. 251,369. Renewed January 17, 1921, Serial No 437,963. 7

To all whom it may concern Be it known that I, BENTLEY A. PLIMP- TON, a citizen of the United States, residing at Victor, in the county of Ontario and State of New York, have invented certain new and useful Improvements in Suspension Insulators; and I do hereby declare the following to be a full, clear, and exact description of the invention, Such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to insulators, and more particularly to insulators of the suspension type, and it has for its object to improve the means whereby the insulator body is attached to, or hung, from the sus pension members that connect the insulators to the main support, or to each other. The improvements are directed in part .toward providing a strong and serviceable connection that may be quickly made. and securely locked, and which will at the same time distribute stresses imposed upon the frangible insulator material. To these and other ends the invention resides in certam improvements and combinations of parts all as will be hereinafter more fully described, the novel features being pointed out in the claims at the end of the specification.

In the drawings:

Figure 1 is a side-view of a suspension insulator unit constructed in accordance with, and illustrating one embodiment of, my in vention;

Fig. 2 is a fragmentary top plan view of the insulator body;

Fig. 3 is a bottom plan view of the. suspension member or socket;

Fig. 1 is a fragmentary transverse sectional view;

Fig. 5 is a similar view taken on another diametrical line, and

Fig. 6 is a horizontal fragmentary sectional view taken substantially on the line66 of Fig. 1. I

Similar reference numerals 1n the several views indicate the same parts.

It will be understood, of course, that the type of insulator with which my invention deals, is customarily used 1n groups or strings whereby one unit 18 supported from another, but I have illustrated n the present instance only one of such units, and, referring to the drawings, 1 indicates the suspension member having an eye by means of which it is attached to the mam support,

and 3 indicates a similar member having an eye 4 by means of which the next suspension member is supported from the first unit. The members land 3 are cup-shaped to constitute sockets, and these sockets are formed with inwardly turned, spaced interior lugs 5 preferably constituting segments of an annulus, as clearly shown in Fig. 3. The suspension members preferably consist of a strong, but bendable material, such as malleable iron, and there is struck inwardly from the side of each socket shell, at a point between two of the lugs 5, a tongue 6.

The insulator proper, composed of porcelain or similar material, consists, in the present instance, of the usual skirt 7, and upper and lower projecting heads 8 and 9. The heads are undercut or otherwise molded to provide segmental annular spaced lugs 10 which are substantial complements of the lugs 5 on the suspension members. These heads 8 and 9 are adapted to loosely occupy the sockets of the respective suspension members.

In applying the insulator to the supporting members, or vice versa, the head thereof is simply inserted in the socket and given a partial rotation so that the lugs 5 and 10 will interlock. The tongue 6 is then bent or displaced inwardly to engage between two adjacent lugs 10 on the insulator head in the paths of their rotation, and the two parts are thus quickly and positively locked against disengagement. Disengagement may be effected by bending the tongue out wardly again and rotating the parts, but this is not frequently necessary.

It will be noted that this construction gives the designer great latitude with respect to choosing the shape and size of the interlocking lugs, so that the strains will be properly borne, and the loose engagement and three-point contact provided by the present embodiment of the invention dis tributesand equalizes the strains accepted by the weaker element of the two, namely, the insulator body.

Having described my invention what I desire to secure by Letters Patent is:

1. In a suspension insulator, the combination with a metallic suspension socket having spaced interior lugs, of a frangible insulator body having a head adapted to occupy the socket and spaced lugs on the head adapted to interlock with those on the socket by a relative rotary movement of the parts, and a locking member on the socket independently movable to a position between adjacent lugs on the insulator head.

2. In a suspension insulator, the combi nation with a suspension socket having spaced interior lugs, of an insulator body havinga head adapted to occupy the socket and spaced lugs on the head adapted to interlock with those on the socket by a relative rotary movement of the parts, and a locking member ,on'the socket movable to a posltlon between ad acent lugs onthe insulator head, and comprising a bendable ftonguestruck inwardly from the material of the socket shell.

3. suspension insulator structure comprising a frangibleinsulator body having a i 7 head with spaced, outwardly projecting lugs lugs on the body, so as to prevent relative turning of the socket and body.

4. A suspension insulator structure com prising a frangible insulator body having a head with spaced, outwardly pro ecting lugs and an'inverted cup-shaped metallic socket provided at its base with spaced, in-

wardly projecting lugs adapted to underlie the lugs on said body, and a metallic tongue formed integral with the socket and adapted to be permanently bent into locking engagement with the body.

BENTLEY A. PLIMPTON. 

